Martingale Collar in Blue Argyle (Handmade in the U.S.A.) Medium Martingale Collars Measure 11-16" length x 1" width for 20-40 lbs dogs All of our Martingale (also known as soft-choke) style collars are handmade in the U.S.A The collars are made with a strong and durable nylon core and covered with a fun, unique 100% cotton fabric pattern. All of our collars are machine washable. We use only the highest quality materials and we guarantee all of our hardware!